---
title: 'Bus Compression vs. Mastering Compression'
url: 'https://www.teachmeaudio.com/mastering/basics/bus-compression-vs-mastering-compression-explained'
markdown: 'https://www.teachmeaudio.com/mastering/basics/bus-compression-vs-mastering-compression-explained.md'
date: '2026-10-22'
description: 'Compression on individual tracks behaves differently than compression on a whole mix. Learn how mastering compression works, what "glue" means, and how to avoid over-compressing your master.'
---

# Bus Compression vs. Mastering Compression 

Compression on individual tracks behaves differently than compression on a whole mix. Learn how mastering compression works, what "glue" means, and how to avoid over-compressing your master.

## What Does Mastering Compression Do?

 When mixing, compression is used to tame dynamic instruments (like a vocal or kick drum). In mastering, compression is used for bus compression, applying a tiny amount of gain reduction across the entire stereo mix to bind all the elements together.

Engineers often call this effect "glue".

## Key Settings for Beginner Mastering Compression

- **Low Ratio (1.5:1 or 2:1):** Keeps processing subtle so you don't squash the music's natural dynamics.
- **Slow Attack Time (30ms – 100ms):** Allows the initial punch of drums (transients) to pass through cleanly before compressing.
- **Auto or Smooth Release Time:** Helps the compressor breathe naturally with the tempo of the song.
- **Subtle Gain Reduction (1 dB to 2 dB):** You should barely see the meter moving. If the needle is constantly pinning down 4–6 dB, you are over-compressing!

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---

## Navigation

- Parent: [Basic Mastering](https://www.teachmeaudio.com/mastering/basics.md)
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